The scan superior helmet is ventilated for comfort the top vents allow hot air out whilst cooler air is drawn in reducing temperatures by 2 3c and avoiding over heating the helmet is manufactured from impact resistant and tough abs acrylonitrile butadiene styrene plastic the terylene harness and a ratchet knob allow quick adjustment a sweatband keeps the forehead dry thus improving comfort specifications helmet weight 400g 6 point terylene harness with sweatband ratchet knob quick adjustment